A display featuring the Xerox Alto personal computer is seen at the Computer History Museum on January 19, 2011 in Mountain View, California. After a two year, $19 million renovation, the Computer History Museum re-opened its doors with a new 25,000 square foot exhibit called Revolution: The First 2000 Years of Computing. The exhibit features over 1,000 artifacts and 100 multimedia stations that explores every major aspect of the history of computing, from the abacus to the smart phone, and every step in between.